Charging apparatus for boiler-furnaces.



No. 882,629. PATENTED OCT. 9, 1906.

P. W. SEYBOTH & E. K. A. BAUMANN. CHARGING APPARATUS FOR BGILBR FURNACES.

APPLICATION FILED SEPT. 1. 1905.

2 SHEETS-SHEET 1.

WITNESSE, INVENTQRS,

FmEDRmHWmfiELM SEYBOTH and. W ERNST KA EXANDER BAUMANN,

' THEHK ATTQRN UNITED STATES PATENT OFFICE.

. FRIEDRICH WILH ELM S'EYBOTH AND ERNST KARL ALEXANDER BAUMANN. OF ZWICKAU, GERMANY, A SSIGNORS TO KONSTRUKTIONSBURO ZWICKAU SEYBOTH, BAUMANN U. (30., OF ZWICKAU, GERMANY.

CHARGING APPARATUS F R BJOILER-FUR'NACES.

To all whom it may concern:

Be it known that we, FRIEDRICH WILHELM SEYBoTn and ERNsT KARL ALEXANDER BAU- MANN, subjects of the German Emperor, and residents of Zwickau, Saxony, Germany, have invented a certain new and,useful Improvement in Charging Ap aratus for Boiler- Furnaces, of which the fol owing is a specification.

This invention relates tochar ing apparatus for boiler-furnaces and the 0 j ects of our improvement are to provide novel and efficient means for crushing fuel, feeding the fuel, and controllin and regulating the distribution of the fuel Prior to our im rovements charging or stoking devices for oiler-furnaces have been rovided Whereinthe quantity of coal to be distributed uniformly over the grate corresponding to the consumption of steam is fed to the lades of a throwing paddle-Wheel from a breaking-roll, the rotation of which roll is controlled from a steam-pressure regulator. These char g devices suffer from the. disadvantage t ligt in the usual steampressure re ulators directly operating the reaking-rollers the regulation is not sensitive, but requires considerable fluctuations. They also have the disadvantage that with fuel of varying hardness in consequence of the various sizes of material broken up by the breaking-roll and thrown by the Wheel onto the grate the distribution even with uniform consumption of steam is not uniform, and further fluctuations in the steam-pressure result. In consequence the purpose of an automatically regulated charging device to keep the steam-pressure as near constant as possible independent of the steam consumption is not served.

The subject of the present invention is an automatically-regulated charging device or stoker which avoids these drawbacks, and the present improvements utilize resilient or yielding charging devices which are controlled from a steam-pressure regulator. A breaking-roll is employed which cooperates with a resiliently-mounted breaking-plate, the driving device of Which roll is moved from a steam-pressure regulator in such a way that with the slightest variations of steam-pressure, which at the most amount to Specification of Letters Patent. Application filed September 1, 1906. Serial No. 276,680.

Patented Oct. 9, 1906.

one per cent. of thenormal steam-pressure, the extent of rotation of the breakin -roll is changed. This breaking-roll guides t e material, broken into uniform size, to a wheel havin elastic blades, which effect the uniform istribution of the coal on the grate.

The subject-matter of the invention is shown in Figures 1 to 11. Fig. 1 shows a cross-section of the automatic char g device; Fig. 2, a side view of the same; ig. 3, a vertical longitudinal section through the charging device connected with the automatic steam-pressure regulator. Fig. 4 is a detail view, partly sectional, showing the manner of assembling the parts of the dis tributing-wheel of Fig. 1. Fi s. 5. and 6 are respectively cross-sectional an longitudinal views of another construction of distributingwheel. Figs. 7 and 8 are longitudinal and side views of a third construction of distributing-Wheel. tional view of a modified form of device for regulating the fuel-crushin device. Fig. 10 is a side view of the rate et-wheel thereof and pawl-shield; and Fig. 11 is an end view showing the relations of ratchet, pawl-shield,

and pawl.

The apparatus in the form illustrated consists of the following parts: 1

The fuel-breaking mechanism.This includes a roll 1, which breaks the coal thrown into the hopper to a uniform size. This breaking-roll 1 works near an elasticallymounted or yielding breaking-plate 2, which breaking-plate 2 oscillates upon the trunnions 3 and is held in itsnormal position by an arm 4 and coil-spring 5, this resilient arran ement of the breaking-plate enabling said p ate to yield When stone or harder coals ass through. The breakin -plate2 may also,

if desired, be opened as a oor fora manual feeding-space when the arm 4 is pressed upwardly against the pressure of the spring 5, so as to enable the plate 2 to turn on the trunnions 3.

The throwing device;-Th1s effects the delivery of the previously-broken coal uniformly on the grate and consists of one or more Wheels 6, which throw the char e into the furnacespace with varying ve ocity. While the diiferent velocity was heretofore obtainedby blades of different length or by Fig. 9 is a detail vertical secmentioned the further advantage is obtained that abreakageiof the blades in conse uenceofthe jamming otthe -coal is not-possi le.

The blades can bemade ofsteel wire orsheet-steel, (metalwire or sheet 'metal,) ac

cording)-to-F1gs.- 1 and-'2 or-Figs-5 and 6. These means-of-"block's orbars '9 which are'heldtogether; 4, by bosses the-conical recessesofi which 'engage the reduced ends of the -blocks or bars-9 ,"or' the wire-or sheets may bra-gripped, Figs. '7 and-8; in spe(c)ialneor more -of the blades can beset inclined to holders 1 6 and secured tothe axle I 1 7 the axle,'(see Figu7,) so that the fuel is not only thrown directly-onto the center of the grate, but also-against the sides.- Instead" of wires or thin-sheets the blades may, as shown in-- Fig's:- 5 'and- 6 be made of two or more're silient plates 1 1, with throwing-strip 12, said plates-beingbolted-ontoth-pnsmatic bushes v 13,' mounted on th'e wheel-shaft 14:-

The covers 23 of the'easing; Fi-gs.'-2 'and8, havemen-concentricperforations fo'rmount ing the shaft '14.-- Hence --by turning the cov ers 'theshaft' can be brought higher orl0Weri. =-e., nearer or-fartherawayfr'om the strip 8- so that the bending of the blades to'the re quired amount and corresponding" tothe wear of the strip can be controlled.

The mechanism-for driving the charging devices mnithth'esteam-pressureregulator.

The wheel shaft' 14=-'is- -driven' b'y* means of belt? ull'e'ys or'toothed-w-heels and may drive the reakin -.roll -shaft"thi'ough. a counter-- shaft? In t eipresentcase a crank-26,-Fig.- 3,; is-keyech tothe wheel-shaft," the in of whioh'w carries a roller" 2 1. This -ro ler ismoveddn' aslot-ted vibrating lever-25;pivotedto the breaking-roller shaft, on'which'le'ver a so Fig. '2) is securedrotatably 1 ou the pivot 1 20, which pawl" engages aratchet-wheel 22," keyed on the breakingroller--.-'shaft'. Hence' the breakin -roller-1s rotated through a small angle only or a complete rotation of the wheel-shaft. 'lh'e'extent of-this angledetermines the quantity-of fuel-brok'emand fed during one-rotation of the Wheel-14,-so-that by regulation of-this an gle theisupplyiof fuel Loanbe regulated withthe slightest variations in steam-pressure. With this object the pawl is rovidedwith a tongue-19, Which=- is control edto a certain laides can be fastenedto the axle byextent by a conical roller 18. The horizontal position of the conical roller 18 with relation to the tongue 19, determines the time whenthe pawl during the forward movement of the vibrating lever isdisengaged from roller 18 and falls into engagement with the ratchet connected with breaking-roll 1. The roller 18is preferably adjustable, by hand or otherwise, to control the extent of movement of the breaking-roll. 1, and the nearer the roller is to the outer side of the hopper the longer will be the en agement of ,said roller with the tongue'lQ and the shorter the movement of the breaking-roll 1. In-the present case the arrangement is such that the position-ofthe onical -roller ,18 is ad justed automatically and by a steam-pres- Th steam-pressureregulatorconsists of a cylinder 27, Fig. 3,in-whicha piston 29 on one side is moved'b spiral spring 28 (or also an air-cushion) an on the- To the piston:-

sure regulator.

other side by steam-pressure. 29 is pivotall'v connected a*rod- 3O,- which moves the bell-crank31 round thewot/825 The bell-crank 31 moves the -r0 33,-"0n o which the conical roller is keyed, and-Which passes through bushes 34 and throu h a-tube: passing across the hopper. is connected throughthe tube 39', *to-the-inte ri0rof the bo ler.- For the purposeof more The cy ihder 27 easily packing the-regulatoppiston there-is-- placed directly under the piston an= oil-cush i ion,- whiohserves for lubricating the cyl-inder: To replenish the'same, thevcocks-40 and- 41 are shut and-"the cock-42 openedi Then a the oil passes from the fu'nnel "43 int0- the short pipe'44gfrom which it flows to the space beneath the piston 29 on iopening the cocks 40 41 and closing of cock=42.': Simulta neously with the regulation of the quantity of-"fuel the regulation-of-the air-supply can-- be-eflected, as shown;-b way-of 'example', in Fig.3, by permitting t shell-crank 31-, by-

means of rod-35, crank-36, and shaft 37,- to adjust the flap-'38- In Figs.-'9 to=11 is shown another arrangement ofregulatorv' In this case themovement ofthe pawl '21 -is. con-=- trolledby a re latingpawl-shield :45,- anranged tomoveetWeenpaWI-Z 1' and ratchet wheel 22, which pawl-shieldu 15-is movedaby a rod 46 (corresponding'lto'rQdBOyhereinbeF fore mentioned); from enga ement of th'e pawl '21:in:theiratchetwhee "22.takes place earlier or later; The.

shield is -mounted -for oscillation .upon': the

axis ofthe ratchet22, which -is-positivelyconnected with the breakingroll- 1,- andthe arrangement of pawl 21 and rocking lever is the same as hereinbefore described..-

' Havingnow described our inventi'onnwhat we claim, and desire to secure by-wLetters Patent of the United States, is-

1. Inr'a charging apparatus for furnaces,:a:' fuel-breaki-ngroll, a fuel-distributing wheel e-regula tor,"so that; according to the position of 'the-shield-, the- .tributinguwheel having resilient paddles for below said roll, a charging-door pivoted to I permit the escape from the apparatus of foreign bodies, and said door carryin a crushinglate cooperating with the rol to crush the el and serving as a guide to direct the crushed fuel to the ditributing-wheel, a shaft and connections for o erating said roll, and a steam-pressure regu ator for varying the movement of said operating connections.

2. In charging apparatus for furnaces, a yielding fuel-breaking means comprisin a yielding crushing-plate and a roll, a fuellisel delivered from said roll, a pawl having a ton ue and a ratchet engaged by said pawl an driving said roll, connections for operating said pawl as desired, a steampressure regulator, and a conical roller adfeeding justably movable by said regulator and hearing upon the pawl-tongue a oresaid.

3. In a chargin apparatus for furnaces, a yielding fuel-brea ing means comprising a yielding crushinglate and a roll, a fuel-distributing wheel or feeding fuel delivered from said roll, a pawl and a ratchet engaged with the ratchet-wheel.

In testimony whereof we have signed our names to this specification 1n the presence of two subscribing witnesses.

FRIEDRICH WILHELM SEYBOTH. ERNST KARL ALEXANDER BAUMANN.

Witnesses:

M. L. CREEVEY, G. MENZEL. 

